Matching the locusts with their scientific names:
Bombay locust → Cyrtacanthacris tatarica (I)
Brown locust → Locusta pradalina (III)
Australian locust → Chortoicetes terminifera (II)
Rocky mountain locust → Melanoplus spretus (IV)
Thus, the correct sequence is: A (I), B (III), C (II), D (IV)